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Diffstat (limited to 'sys/arch/i386/include/psl.h')
| -rw-r--r-- | sys/arch/i386/include/psl.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/sys/arch/i386/include/psl.h b/sys/arch/i386/include/psl.h new file mode 100644 index 00000000000..4160fe81f04 --- /dev/null +++ b/sys/arch/i386/include/psl.h @@ -0,0 +1,175 @@ +/* $NetBSD: psl.h,v 1.22 1995/10/11 04:20:23 mycroft Exp $ */ + +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)psl.h 5.2 (Berkeley) 1/18/91 + */ + +#ifndef _I386_PSL_H_ +#define _I386_PSL_H_ + +/* + * 386 processor status longword. + */ +#define PSL_C 0x00000001 /* carry flag */ +#define PSL_PF 0x00000004 /* parity flag */ +#define PSL_AF 0x00000010 /* auxiliary carry flag */ +#define PSL_Z 0x00000040 /* zero flag */ +#define PSL_N 0x00000080 /* sign flag */ +#define PSL_T 0x00000100 /* trap flag */ +#define PSL_I 0x00000200 /* interrupt enable flag */ +#define PSL_D 0x00000400 /* direction flag */ +#define PSL_V 0x00000800 /* overflow flag */ +#define PSL_IOPL 0x00003000 /* i/o privilege level */ +#define PSL_NT 0x00004000 /* nested task */ +#define PSL_RF 0x00010000 /* resume flag */ +#define PSL_VM 0x00020000 /* virtual 8086 mode */ +#define PSL_AC 0x00040000 /* alignment check flag */ +#define PSL_VIF 0x00080000 /* virtual interrupt enable flag */ +#define PSL_VIP 0x00100000 /* virtual interrupt pending flag */ +#define PSL_ID 0x00200000 /* identification flag */ + +#define PSL_MBO 0x00000002 /* must be one bits */ +#define PSL_MBZ 0xffc08028 /* must be zero bits */ + +#define PSL_USERSET (PSL_MBO | PSL_I) +#ifdef VM86 +#define PSL_USERSTATIC (PSL_MBO | PSL_MBZ | PSL_I | PSL_IOPL | PSL_VIF | PSL_VIP) +#else +#define PSL_USERSTATIC (PSL_MBO | PSL_MBZ | PSL_I | PSL_IOPL | PSL_VM | PSL_VIF | PSL_VIP) +#endif + +#ifdef _KERNEL + +/* Interrupt priority `levels'; not mutually exclusive. */ +#define IPL_NONE -1 +#define IPL_BIO 0 /* block I/O */ +#define IPL_NET 1 /* network */ +#define IPL_TTY 2 /* terminal */ +#define IPL_CLOCK 3 /* clock */ +#define IPL_IMP 4 /* memory allocation */ + +/* Interrupt sharing types. */ +#define IST_NONE 0 /* none */ +#define IST_PULSE 1 /* pulsed */ +#define IST_EDGE 2 /* edge-triggered */ +#define IST_LEVEL 3 /* level-triggered */ + +/* Soft interrupt masks. */ +#define SIR_CLOCK 31 +#define SIR_CLOCKMASK ((1 << SIR_CLOCK)) +#define SIR_NET 30 +#define SIR_NETMASK ((1 << SIR_NET) | SIR_CLOCKMASK) +#define SIR_TTY 29 +#define SIR_TTYMASK ((1 << SIR_TTY) | SIR_CLOCKMASK) +#define SIR_ALLMASK (SIR_CLOCKMASK | SIR_NETMASK | SIR_TTYMASK) + +#ifndef LOCORE + +int cpl, ipending, astpending, imask[5]; + +/* + * Add a mask to cpl, and return the old value of cpl. + */ +static __inline int +splraise(ncpl) + register int ncpl; +{ + register int ocpl = cpl; + cpl |= ncpl; + return (ocpl); +} + +extern void spllower __P((void)); + +/* + * Restore a value to cpl (unmasking interrupts). If any unmasked + * interrupts are pending, call spllower() to process them. + * + * NOTE: We go to the trouble of returning the old value of cpl for + * the benefit of some splsoftclock() callers. This extra work is + * usually optimized away by the compiler. + */ +static __inline int +splx(ncpl) + register int ncpl; +{ + register int ocpl = cpl; + cpl = ncpl; + if (ipending & ~ncpl) + spllower(); + return (ocpl); +} + +/* + * Hardware interrupt masks + */ +#define splbio() splraise(imask[IPL_BIO]) +#define splnet() splraise(imask[IPL_NET]) +#define spltty() splraise(imask[IPL_TTY]) +#define splclock() splraise(imask[IPL_CLOCK]) +#define splimp() splraise(imask[IPL_IMP]) +#define splstatclock() splclock() + +/* + * Software interrupt masks + * + * NOTE: splsoftclock() is used by hardclock() to lower the priority from + * clock to softclock before it calls softclock(). + */ +#define splsoftclock() splx(SIR_CLOCKMASK) +#define splsoftnet() splraise(SIR_NETMASK) +#define splsofttty() splraise(SIR_TTYMASK) + +/* + * Miscellaneous + */ +#define splhigh() splraise(-1) +#define spl0() splx(0) + +/* + * Software interrupt registration + */ +#define softintr(n) (ipending |= (1 << (n))) +#define setsoftast() (astpending = 1) +#define setsoftclock() softintr(SIR_CLOCK) +#define setsoftnet() softintr(SIR_NET) +#define setsofttty() softintr(SIR_TTY) + +#endif /* !LOCORE */ +#endif /* _KERNEL */ + +#endif /* !_I386_PSL_H_ */ |